12.
#4 – Firefox Web Developer Toolbar
Testing
● Disable CSS
● This is near what a
search engine or screen
reader 'sees'
● Can you still get around
and does the page make
sense?
● Good, semantic markup
helps users and search
engines.

14.
#4 – Firefox Web Developer Toolbar
Test
● Disable JavaScript
● Does your site
degrade gracefully?
● Is there an alternate
version or message?
● Can you navigate?
● Do forms and
behaviors still work?